Hi ben1982,
Myself and a few other moderators are doing are best to answer as many questions as possible, but I can tell you the folks internally are responding to as many people as quickly as possible. I'm sorry if they haven't gotten back to you yet.
To clarify my sticky above, our files on our server were never corrupted.
Some customers were getting corrupted downloads due to whatever reason (slow internet connects, interrupted downloads without using a download manager, heavy traffic on the servers (maybe? who knows), etc.). The point is, when extracting the corrupted installers to their %temp% folder, their
extracted contents were corrupted. This was resulting in us having to suggest customers to manually delete their extracted contents in their %temp% folder before running the installer again.
The change is that the new Part 1 installers do this for you automatically when running. Very minor change, but it saves people some headaches.
In any case, the best suggestion we can make is definitely what some folks above have said (download managers, disk checks, etc.). A download manager will make a huge difference. Also, if you're running any anti-virus software in the background, try temporarily disabling it. The downloads hosted will be safe to download so if you need to feed your guard dog for a moment it's okay to give him a break :)
Also, are you downloading multiple files at once? It might be painstakingly slower, but if necessary make a point to only run one download at a time.
Definitely don't give up on it!